Doctor Who: The Hypersphere Principle

Hypersphere – (n) 1) The 3-dimensional surface of a 4-dimensional sphere 2) The shape of the our universe

“Every great decision creates ripples, like a huge boulder dropped in a lake. The ripples merge and rebound off the banks in unforeseeable ways. The heavier the decision, the larger the waves, the more uncertain the consequences.” — The Doctor